Mechanism of grain refinement in an equiatomic medium-entropy alloy CrCoNi during hot deformation
发布时间：2019-12-30
点击次数：
影响因子：6.2
DOI码：10.1016/j.jallcom.2019.152382
所属单位：中南大学粉末冶金研究院
教研室：高温结构材料研究所
发表刊物：Journal of Alloys and Compounds
项目来源：中南大学高性能复合体制造国家重点实验室项目（ZZYJKT2019-04），中南大学科学研究初始资金（202045001），中国国家自然科学基金（NSFC）（51901247），中南大学基本研究基金（ 2019zzts526）
关键字：Medium entropy alloy, Hot deformation, Continuous dynamic recrystallization, Grain refinement
摘要：With promising mechanical properties, the newly developed medium-entropy alloy (MEA) has aroused widespread interest recently. Plastic deformation processes including hot working are usually adopted to refine the grain of many alloys and thereby enhance the strength, hardness, and wear resistance at low temperatures. So far, few discoveries have reported the mechanism of grain refinement during hot deformation on MEA, especially for CrCoNi. In this article, plastic deformation at different conditions was intentionally designed to uncover the underlying mechanism of grain refinement in CrCoNi MEA alloy. Unlike many other alloys with low stacking fault energy, the occurrence of continuous dynamic recrystallization during hot deformation of CrCoNi alloy has been unexpectedly discovered, which is proved as the dominating mechanism for grain refinement of the current alloy. (C) 2019 Elsevier B.V. All rights reserved.
合写作者：Yifan Zhao, Bin Gan, Xiaofei Sheng, Yu Liu
第一作者：Guoai He
论文类型：Article
通讯作者：谭黎明
论文编号：152382
学科门类：工学
一级学科：冶金
卷号：815
ISSN号：0925-8388
是否译文：否
发表时间：2019-12-30